Reinforcing

Heya i have been trolling net looking for info regarding how the mechanics of reinforcing a town work without much success fairly conflicting stuff out there, with much of it fairly old.

I reinforced my clan mate last night 300k troops and 300k scouts we took a big scout hit and just won the battle but the battle report didn't show my hero or hero dbl. The way it looks to me is that the towns hero is the one that will affect the troops in the town or the highest level hero as the town i was reinforcing had a higher level hero in it than me.